Solve the problem.How many 4-digit numbers can be formed using the digits 0, 1, 2, 3, 4, 5, 6, if repeated digits are not allowed and the first digit may not be a 0?
A. 23
B. 2401
C. 24
D. 720
Answer: D
Mathematics
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Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. ln 
+ 
ln 
+ tan-1 
+ C
B. 4 ln 
- 
ln 
- tan-1 x + C
C. 4 ln 
+ 
ln 
+ 
tan-1 
+ C
D. 4 ln 
+ 
ln 
+ sin-1 
+ C
Mathematics
Write as mixed number.
A. 2
B. 1
C. 2
D. 
Mathematics
The function f is one-to-one. Find its inverse.f(x) = x3 + 2
A. f-1(x) = 
B. f-1(x) = 
- 2
C. f-1(x) = 
+ 2
D. f-1(x) = 
Mathematics
Represent the quantity with an integer.247 feet above sea level
A. +247 B. -247
Mathematics